IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v17y2024i13p3184-d1424640.html
   My bibliography  Save this article

Study on the Operation Optimization of Medium-Depth U-Type Ground Source Heat Pump Systems

Author

Listed:
  • Chaohui Zhou

    (CTG Wuhan Science and Technology Innovation Park, China Three Gorges Corporation, Wuhan 430010, China)

  • Yue Hu

    (CTG Wuhan Science and Technology Innovation Park, China Three Gorges Corporation, Wuhan 430010, China)

  • Yuce Liu

    (CTG Wuhan Science and Technology Innovation Park, China Three Gorges Corporation, Wuhan 430010, China)

  • Rujie Liu

    (China Yangtze Power Co., Ltd., Wuhan 430010, China)

  • Yongqiang Luo

    (School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Xiao Wang

    (China Yangtze Power Co., Ltd., Wuhan 430010, China)

  • Huiheng Luo

    (CTG Wuhan Science and Technology Innovation Park, China Three Gorges Corporation, Wuhan 430010, China)

Abstract

Deep geothermal energy is a sustainable and renewable spacing heating source. Although many studies have discussed the design optimization of deep borehole systems, few have accomplished optimization and in-depth analysis of system operation control. In this study, an analytical model of the U-type deep borehole heat exchanger is proposed, and the average relative error between the simulated outlet temperatures and experimental data is −3.2%. Then, this paper presents an integrated model for the operation optimization study of the U-type deep-borehole ground source heat pump system. The optimal control of flow rate is adopted to match the variation in heating load. Compared with the constant-flow rate (110 m 3 /h) operation mode, the variable flow rate method reduces the power consumption of the heat pump and circulating pump by 22.1%, from 288,423 kW·h to 224,592 kW·h, during 2112 h of operation. In addition, the system has a larger RHS and COP when the thermal conductivity of the backfill material increases. When the borehole depth increases by 200 m from 2300 m, the energy consumption of the circulating pump will drop from 85,844 kW·h to 56,548 kW·h. The COP of the heat pump unit will decrease approximately linearly as the heating load increases, and the total power consumption will increase accordingly. This work can provide guidance for the design and optimization of U-shaped GSHP systems.

Suggested Citation

  • Chaohui Zhou & Yue Hu & Yuce Liu & Rujie Liu & Yongqiang Luo & Xiao Wang & Huiheng Luo, 2024. "Study on the Operation Optimization of Medium-Depth U-Type Ground Source Heat Pump Systems," Energies, MDPI, vol. 17(13), pages 1-15, June.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3184-:d:1424640
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/17/13/3184/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/17/13/3184/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Casasso, Alessandro & Sethi, Rajandrea, 2014. "Efficiency of closed loop geothermal heat pumps: A sensitivity analysis," Renewable Energy, Elsevier, vol. 62(C), pages 737-746.
    2. Jello, Josiane & Baser, Tugce, 2023. "Utilization of existing hydrocarbon wells for geothermal system development: A review," Applied Energy, Elsevier, vol. 348(C).
    3. Asif Mehmood & Jun Yao & Dongyan Fan & Kelvin Bongole & Junrong Liu & Xu Zhang, 2019. "Potential for heat production by retrofitting abandoned gas wells into geothermal wells," PLOS ONE, Public Library of Science, vol. 14(8), pages 1-19, August.
    4. Shen, Junhao & Zhou, Chaohui & Luo, Yongqiang & Tian, Zhiyong & Zhang, Shicong & Fan, Jianhua & Ling, Zhang, 2023. "Comprehensive thermal performance analysis and optimization study on U-type deep borehole ground source heat pump systems based on a new analytical model," Energy, Elsevier, vol. 274(C).
    5. Holmberg, Henrik & Acuña, José & Næss, Erling & Sønju, Otto K., 2016. "Thermal evaluation of coaxial deep borehole heat exchangers," Renewable Energy, Elsevier, vol. 97(C), pages 65-76.
    6. Cheng, Wen-Long & Li, Tong-Tong & Nian, Yong-Le & Wang, Chang-Long, 2013. "Studies on geothermal power generation using abandoned oil wells," Energy, Elsevier, vol. 59(C), pages 248-254.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Shen, Junhao & Zhou, Chaohui & Luo, Yongqiang & Tian, Zhiyong & Zhang, Shicong & Fan, Jianhua & Ling, Zhang, 2023. "Comprehensive thermal performance analysis and optimization study on U-type deep borehole ground source heat pump systems based on a new analytical model," Energy, Elsevier, vol. 274(C).
    2. Liang Zhang & Songhe Geng & Jun Kang & Jiahao Chao & Linchao Yang & Fangping Yan, 2020. "Experimental Study on the Heat Exchange Mechanism in a Simulated Self-Circulation Wellbore," Energies, MDPI, vol. 13(11), pages 1-22, June.
    3. Chen, Chaofan & Cai, Wanlong & Naumov, Dmitri & Tu, Kun & Zhou, Hongwei & Zhang, Yuping & Kolditz, Olaf & Shao, Haibing, 2021. "Numerical investigation on the capacity and efficiency of a deep enhanced U-tube borehole heat exchanger system for building heating," Renewable Energy, Elsevier, vol. 169(C), pages 557-572.
    4. Isa Kolo & Christopher S. Brown & Gioia Falcone & David Banks, 2023. "Repurposing a Geothermal Exploration Well as a Deep Borehole Heat Exchanger: Understanding Long-Term Effects of Lithological Layering, Flow Direction, and Circulation Flow Rate," Sustainability, MDPI, vol. 15(5), pages 1-24, February.
    5. Jello, Josiane & Baser, Tugce, 2023. "Utilization of existing hydrocarbon wells for geothermal system development: A review," Applied Energy, Elsevier, vol. 348(C).
    6. Luka Boban & Dino Miše & Stjepan Herceg & Vladimir Soldo, 2021. "Application and Design Aspects of Ground Heat Exchangers," Energies, MDPI, vol. 14(8), pages 1-31, April.
    7. Bu, Xianbiao & Ran, Yunmin & Zhang, Dongdong, 2019. "Experimental and simulation studies of geothermal single well for building heating," Renewable Energy, Elsevier, vol. 143(C), pages 1902-1909.
    8. Rivera, Jaime A. & Blum, Philipp & Bayer, Peter, 2015. "Ground energy balance for borehole heat exchangers: Vertical fluxes, groundwater and storage," Renewable Energy, Elsevier, vol. 83(C), pages 1341-1351.
    9. Kurnia, Jundika C. & Putra, Zulfan A. & Muraza, Oki & Ghoreishi-Madiseh, Seyed Ali & Sasmito, Agus P., 2021. "Numerical evaluation, process design and techno-economic analysis of geothermal energy extraction from abandoned oil wells in Malaysia," Renewable Energy, Elsevier, vol. 175(C), pages 868-879.
    10. Sun, Fengrui & Yao, Yuedong & Chen, Mingqiang & Li, Xiangfang & Zhao, Lin & Meng, Ye & Sun, Zheng & Zhang, Tao & Feng, Dong, 2017. "Performance analysis of superheated steam injection for heavy oil recovery and modeling of wellbore heat efficiency," Energy, Elsevier, vol. 125(C), pages 795-804.
    11. Wang, Gaosheng & Song, Xianzhi & Shi, Yu & Yang, Ruiyue & Yulong, Feixue & Zheng, Rui & Li, Jiacheng, 2021. "Heat extraction analysis of a novel multilateral-well coaxial closed-loop geothermal system," Renewable Energy, Elsevier, vol. 163(C), pages 974-986.
    12. Gao, Xuefeng & Zhang, Yanjun & Cheng, Yuxiang & Huang, Yibin & Deng, Hao & Ma, Yongjie, 2022. "A novel strategy utilizing local fracture networks to enhance CBHE heat extraction performance: A case study of the Songyuan geothermal field in China," Energy, Elsevier, vol. 255(C).
    13. Nian, Yong-Le & Cheng, Wen-Long, 2018. "Insights into geothermal utilization of abandoned oil and gas wells," Renewable and Sustainable Energy Reviews, Elsevier, vol. 87(C), pages 44-60.
    14. Tang, F. & Lahoori, M. & Nowamooz, H. & Rosin-Paumier, S. & Masrouri, F., 2021. "A numerical study into effects of soil compaction and heat storage on thermal performance of a Horizontal Ground Heat Exchanger," Renewable Energy, Elsevier, vol. 172(C), pages 740-752.
    15. Sun, Fengrui & Yao, Yuedong & Li, Guozhen & Li, Xiangfang, 2018. "Geothermal energy extraction in CO2 rich basin using abandoned horizontal wells," Energy, Elsevier, vol. 158(C), pages 760-773.
    16. Shi, Yu & Song, Xianzhi & Wang, Gaosheng & McLennan, John & Forbes, Bryan & Li, Xiaojiang & Li, Jiacheng, 2019. "Study on wellbore fluid flow and heat transfer of a multilateral-well CO2 enhanced geothermal system," Applied Energy, Elsevier, vol. 249(C), pages 14-27.
    17. Zolfaghari, Seyed Mohammad & Soltani, M. & Hosseinpour, Morteza & Nathwani, Jatin, 2023. "Comprehensive analysis of geothermal energy integration with heavy oil upgrading in hot compressed water," Applied Energy, Elsevier, vol. 345(C).
    18. Somogyi, Viola & Sebestyén, Viktor & Nagy, Georgina, 2017. "Scientific achievements and regulation of shallow geothermal systems in six European countries – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 68(P2), pages 934-952.
    19. Al Saedi, A.Q. & Sharma, P. & Kabir, C.S., 2021. "A novel cyclical wellbore-fluid circulation strategy for extracting geothermal energy," Energy, Elsevier, vol. 235(C).
    20. Xie, Kun & Nian, Yong-Le & Cheng, Wen-Long, 2018. "Analysis and optimization of underground thermal energy storage using depleted oil wells," Energy, Elsevier, vol. 163(C), pages 1006-1016.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3184-:d:1424640. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.